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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013-2014 Martin Ling <martin-sigrok@earth.li> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | /** | |
21 | ||
22 | @mainpage API Reference | |
23 | ||
24 | Introduction | |
25 | ------------ | |
26 | ||
27 | The libsigrokcxx API provides an object-oriented C++ interface to the | |
28 | functionality in libsigrok, including automatic memory and resource management. | |
29 | ||
30 | It is built on top of the public libsigrok C API, and is designed to be used as | |
31 | a standalone alternative API. Programs should not mix usage of the C and C++ | |
32 | APIs; the C++ interface code needs to have full control of all C API calls for | |
33 | resources to be managed correctly. | |
34 | ||
35 | Memory management | |
36 | ----------------- | |
37 | ||
38 | All runtime objects created through the C++ API are passed and accessed via | |
39 | shared pointers, using the C++11 std::shared_ptr implementation. This means | |
40 | that a reference count is kept for each object. | |
41 | ||
42 | Shared pointers can be copied and assigned in a user's program, automatically | |
43 | updating their reference count and deleting objects when they are no longer in | |
44 | use. The C++ interface code also keeps track of internal dependencies between | |
45 | libsigrok resources, and ensures that objects are not prematurely deleted when | |
46 | their resources are in use by other objects. | |
47 | ||
48 | This means that management of libsigrokcxx objects and their underlying | |
49 | libsigrok resources can be treated as fully automatic. As long as all shared | |
50 | pointers to objects are deleted or reassigned when no longer in use, all | |
51 | underlying resources will be released at the right time. | |
52 | ||
53 | Getting started | |
54 | --------------- | |
55 | ||
56 | Usage of the C++ API needs to begin with a call to sigrok::Context::create(). | |
57 | This will create the global libsigrok context and returns a shared pointer to | |
58 | the sigrok::Context object. Methods on this object provide access to the | |
59 | hardware drivers, input and output formats supported by the library, as well | |
60 | as means of creating other objects such as sessions and triggers. | |
61 | ||
62 | Error handling | |
63 | -------------- | |
64 | ||
65 | When any libsigrok C API call returns an error, a sigrok::Error exception is | |
66 | raised, which provides access to the error code and description. | |
67 | ||
68 | */ | |
69 | ||
70 | #ifndef LIBSIGROKCXX_HPP | |
71 | #define LIBSIGROKCXX_HPP | |
72 | ||
73 | #include <libsigrok/libsigrok.h> | |
74 | ||
75 | /* Suppress warnings due to glibmm's use of std::auto_ptr<> in a public | |
76 | * header file. To be removed once glibmm is fixed. */ | |
77 | G_GNUC_BEGIN_IGNORE_DEPRECATIONS | |
78 | #include <glibmm.h> | |
79 | G_GNUC_END_IGNORE_DEPRECATIONS | |
80 | ||
81 | #include <stdexcept> | |
82 | #include <memory> | |
83 | #include <vector> | |
84 | #include <map> | |
85 | #include <set> | |
86 | ||
87 | namespace sigrok | |
88 | { | |
89 | ||
90 | using namespace std; | |
91 | ||
92 | /* Forward declarations */ | |
93 | class SR_API Error; | |
94 | class SR_API Context; | |
95 | class SR_API Driver; | |
96 | class SR_API Device; | |
97 | class SR_API HardwareDevice; | |
98 | class SR_API Channel; | |
99 | class SR_API Session; | |
100 | class SR_API ConfigKey; | |
101 | class SR_API Capability; | |
102 | class SR_API InputFormat; | |
103 | class SR_API OutputFormat; | |
104 | class SR_API OutputFlag; | |
105 | class SR_API LogLevel; | |
106 | class SR_API ChannelGroup; | |
107 | class SR_API Trigger; | |
108 | class SR_API TriggerStage; | |
109 | class SR_API TriggerMatch; | |
110 | class SR_API TriggerMatchType; | |
111 | class SR_API ChannelType; | |
112 | class SR_API Packet; | |
113 | class SR_API PacketPayload; | |
114 | class SR_API PacketType; | |
115 | class SR_API Quantity; | |
116 | class SR_API Unit; | |
117 | class SR_API QuantityFlag; | |
118 | class SR_API Rational; | |
119 | class SR_API Input; | |
120 | class SR_API InputDevice; | |
121 | class SR_API Output; | |
122 | class SR_API DataType; | |
123 | class SR_API Option; | |
124 | class SR_API UserDevice; | |
125 | ||
126 | /** Exception thrown when an error code is returned by any libsigrok call. */ | |
127 | class SR_API Error: public exception | |
128 | { | |
129 | public: | |
130 | explicit Error(int result); | |
131 | ~Error() noexcept; | |
132 | const int result; | |
133 | const char *what() const noexcept; | |
134 | }; | |
135 | ||
136 | /* Base template for classes whose resources are owned by a parent object. */ | |
137 | template <class Class, class Parent> | |
138 | class SR_API ParentOwned | |
139 | { | |
140 | private: | |
141 | /* Weak pointer for shared_from_this() implementation. */ | |
142 | weak_ptr<Class> _weak_this; | |
143 | ||
144 | static void reset_parent(Class *object) | |
145 | { | |
146 | if (!object->_parent) | |
147 | throw Error(SR_ERR_BUG); | |
148 | object->_parent.reset(); | |
149 | } | |
150 | ||
151 | protected: | |
152 | /* Parent object which owns this child object's underlying structure. | |
153 | ||
154 | This shared pointer will be null when this child is unused, but | |
155 | will be assigned to point to the parent before any shared pointer | |
156 | to this child is handed out to the user. | |
157 | ||
158 | When the reference count of this child falls to zero, this shared | |
159 | pointer to its parent is reset by a custom deleter on the child's | |
160 | shared pointer. | |
161 | ||
162 | This strategy ensures that the destructors for both the child and | |
163 | the parent are called at the correct time, i.e. only when all | |
164 | references to both the parent and all its children are gone. */ | |
165 | shared_ptr<Parent> _parent; | |
166 | ||
167 | ParentOwned() {} | |
168 | ||
169 | /* Note, this implementation will create a new smart_ptr if none exists. */ | |
170 | shared_ptr<Class> shared_from_this() | |
171 | { | |
172 | shared_ptr<Class> shared = _weak_this.lock(); | |
173 | ||
174 | if (!shared) | |
175 | { | |
176 | shared.reset(static_cast<Class *>(this), &reset_parent); | |
177 | _weak_this = shared; | |
178 | } | |
179 | ||
180 | return shared; | |
181 | } | |
182 | ||
183 | shared_ptr<Class> share_owned_by(shared_ptr<Parent> parent) | |
184 | { | |
185 | if (!parent) | |
186 | throw Error(SR_ERR_BUG); | |
187 | this->_parent = parent; | |
188 | return shared_from_this(); | |
189 | } | |
190 | ||
191 | public: | |
192 | /* Get parent object that owns this object. */ | |
193 | shared_ptr<Parent> parent() | |
194 | { | |
195 | return _parent; | |
196 | } | |
197 | }; | |
198 | ||
199 | /* Base template for classes whose resources are owned by the user. */ | |
200 | template <class Class> | |
201 | class SR_API UserOwned : public enable_shared_from_this<Class> | |
202 | { | |
203 | protected: | |
204 | UserOwned() {} | |
205 | ||
206 | shared_ptr<Class> shared_from_this() | |
207 | { | |
208 | auto shared = enable_shared_from_this<Class>::shared_from_this(); | |
209 | if (!shared) | |
210 | throw Error(SR_ERR_BUG); | |
211 | return shared; | |
212 | } | |
213 | }; | |
214 | ||
215 | /** Type of log callback */ | |
216 | typedef function<void(const LogLevel *, string message)> LogCallbackFunction; | |
217 | ||
218 | /** Resource reader delegate. */ | |
219 | class SR_API ResourceReader | |
220 | { | |
221 | public: | |
222 | ResourceReader() {} | |
223 | virtual ~ResourceReader(); | |
224 | private: | |
225 | /** Resource open hook. */ | |
226 | virtual void open(struct sr_resource *res, string name) = 0; | |
227 | /** Resource close hook. */ | |
228 | virtual void close(struct sr_resource *res) = 0; | |
229 | /** Resource read hook. */ | |
230 | virtual size_t read(const struct sr_resource *res, void *buf, size_t count) = 0; | |
231 | ||
232 | static SR_PRIV int open_callback(struct sr_resource *res, | |
233 | const char *name, void *cb_data) noexcept; | |
234 | static SR_PRIV int close_callback(struct sr_resource *res, | |
235 | void *cb_data) noexcept; | |
236 | static SR_PRIV gssize read_callback(const struct sr_resource *res, | |
237 | void *buf, size_t count, void *cb_data) noexcept; | |
238 | friend class Context; | |
239 | }; | |
240 | ||
241 | /** The global libsigrok context */ | |
242 | class SR_API Context : public UserOwned<Context> | |
243 | { | |
244 | public: | |
245 | /** Create new context */ | |
246 | static shared_ptr<Context> create(); | |
247 | /** libsigrok package version. */ | |
248 | static string package_version(); | |
249 | /** libsigrok library version. */ | |
250 | static string lib_version(); | |
251 | /** Available hardware drivers, indexed by name. */ | |
252 | map<string, shared_ptr<Driver> > drivers(); | |
253 | /** Available input formats, indexed by name. */ | |
254 | map<string, shared_ptr<InputFormat> > input_formats(); | |
255 | /** Available output formats, indexed by name. */ | |
256 | map<string, shared_ptr<OutputFormat> > output_formats(); | |
257 | /** Current log level. */ | |
258 | const LogLevel *log_level() const; | |
259 | /** Set the log level. | |
260 | * @param level LogLevel to use. */ | |
261 | void set_log_level(const LogLevel *level); | |
262 | /** Set the log callback. | |
263 | * @param callback Callback of the form callback(LogLevel, string). */ | |
264 | void set_log_callback(LogCallbackFunction callback); | |
265 | /** Set the log callback to the default handler. */ | |
266 | void set_log_callback_default(); | |
267 | /** Install a delegate for reading resource files. | |
268 | * @param reader The resource reader delegate, or nullptr to unset. */ | |
269 | void set_resource_reader(ResourceReader *reader); | |
270 | /** Create a new session. */ | |
271 | shared_ptr<Session> create_session(); | |
272 | /** Create a new user device. */ | |
273 | shared_ptr<UserDevice> create_user_device( | |
274 | string vendor, string model, string version); | |
275 | /** Create a header packet. */ | |
276 | shared_ptr<Packet> create_header_packet(Glib::TimeVal start_time); | |
277 | /** Create a meta packet. */ | |
278 | shared_ptr<Packet> create_meta_packet( | |
279 | map<const ConfigKey *, Glib::VariantBase> config); | |
280 | /** Create a logic packet. */ | |
281 | shared_ptr<Packet> create_logic_packet( | |
282 | void *data_pointer, size_t data_length, unsigned int unit_size); | |
283 | /** Create an analog packet. */ | |
284 | shared_ptr<Packet> create_analog_packet( | |
285 | vector<shared_ptr<Channel> > channels, | |
286 | const float *data_pointer, unsigned int num_samples, const Quantity *mq, | |
287 | const Unit *unit, vector<const QuantityFlag *> mqflags); | |
288 | /** Load a saved session. | |
289 | * @param filename File name string. */ | |
290 | shared_ptr<Session> load_session(string filename); | |
291 | /** Create a new trigger. | |
292 | * @param name Name string for new trigger. */ | |
293 | shared_ptr<Trigger> create_trigger(string name); | |
294 | /** Open an input file. | |
295 | * @param filename File name string. */ | |
296 | shared_ptr<Input> open_file(string filename); | |
297 | /** Open an input stream based on header data. | |
298 | * @param header Initial data from stream. */ | |
299 | shared_ptr<Input> open_stream(string header); | |
300 | map<string, string> serials(shared_ptr<Driver> driver) const; | |
301 | private: | |
302 | struct sr_context *_structure; | |
303 | map<string, unique_ptr<Driver> > _drivers; | |
304 | map<string, unique_ptr<InputFormat> > _input_formats; | |
305 | map<string, unique_ptr<OutputFormat> > _output_formats; | |
306 | Session *_session; | |
307 | LogCallbackFunction _log_callback; | |
308 | Context(); | |
309 | ~Context(); | |
310 | friend class Session; | |
311 | friend class Driver; | |
312 | friend struct std::default_delete<Context>; | |
313 | }; | |
314 | ||
315 | /** An object that can be configured. */ | |
316 | class SR_API Configurable | |
317 | { | |
318 | public: | |
319 | /** Supported configuration keys. */ | |
320 | set<const ConfigKey *> config_keys() const; | |
321 | /** Read configuration for the given key. | |
322 | * @param key ConfigKey to read. */ | |
323 | Glib::VariantBase config_get(const ConfigKey *key) const; | |
324 | /** Set configuration for the given key to a specified value. | |
325 | * @param key ConfigKey to set. | |
326 | * @param value Value to set. */ | |
327 | void config_set(const ConfigKey *key, const Glib::VariantBase &value); | |
328 | /** Enumerate available values for the given configuration key. | |
329 | * @param key ConfigKey to enumerate values for. */ | |
330 | Glib::VariantContainerBase config_list(const ConfigKey *key) const; | |
331 | /** Enumerate configuration capabilities for the given configuration key. | |
332 | * @param key ConfigKey to enumerate capabilities for. */ | |
333 | set<const Capability *> config_capabilities(const ConfigKey *key) const; | |
334 | /** Check whether a configuration capability is supported for a given key. | |
335 | * @param key ConfigKey to check. | |
336 | * @param capability Capability to check for. */ | |
337 | bool config_check(const ConfigKey *key, const Capability *capability) const; | |
338 | protected: | |
339 | Configurable( | |
340 | struct sr_dev_driver *driver, | |
341 | struct sr_dev_inst *sdi, | |
342 | struct sr_channel_group *channel_group); | |
343 | virtual ~Configurable(); | |
344 | struct sr_dev_driver *config_driver; | |
345 | struct sr_dev_inst *config_sdi; | |
346 | struct sr_channel_group *config_channel_group; | |
347 | }; | |
348 | ||
349 | /** A hardware driver provided by the library */ | |
350 | class SR_API Driver : public ParentOwned<Driver, Context>, public Configurable | |
351 | { | |
352 | public: | |
353 | /** Name of this driver. */ | |
354 | string name() const; | |
355 | /** Long name for this driver. */ | |
356 | string long_name() const; | |
357 | /** Scan options supported by this driver. */ | |
358 | set<const ConfigKey *> scan_options() const; | |
359 | /** Scan for devices and return a list of devices found. | |
360 | * @param options Mapping of (ConfigKey, value) pairs. */ | |
361 | vector<shared_ptr<HardwareDevice> > scan(map<const ConfigKey *, Glib::VariantBase> | |
362 | options = map<const ConfigKey *, Glib::VariantBase>()); | |
363 | private: | |
364 | struct sr_dev_driver *_structure; | |
365 | bool _initialized; | |
366 | vector<HardwareDevice *> _devices; | |
367 | explicit Driver(struct sr_dev_driver *structure); | |
368 | ~Driver(); | |
369 | friend class Context; | |
370 | friend class HardwareDevice; | |
371 | friend class ChannelGroup; | |
372 | friend struct std::default_delete<Driver>; | |
373 | }; | |
374 | ||
375 | /** A generic device, either hardware or virtual */ | |
376 | class SR_API Device : public Configurable | |
377 | { | |
378 | public: | |
379 | /** Vendor name for this device. */ | |
380 | string vendor() const; | |
381 | /** Model name for this device. */ | |
382 | string model() const; | |
383 | /** Version string for this device. */ | |
384 | string version() const; | |
385 | /** Serial number for this device. */ | |
386 | string serial_number() const; | |
387 | /** Connection ID for this device. */ | |
388 | string connection_id() const; | |
389 | /** List of the channels available on this device. */ | |
390 | vector<shared_ptr<Channel> > channels(); | |
391 | /** Channel groups available on this device, indexed by name. */ | |
392 | map<string, shared_ptr<ChannelGroup> > channel_groups(); | |
393 | /** Open device. */ | |
394 | void open(); | |
395 | /** Close device. */ | |
396 | void close(); | |
397 | protected: | |
398 | explicit Device(struct sr_dev_inst *structure); | |
399 | ~Device(); | |
400 | virtual shared_ptr<Device> get_shared_from_this() = 0; | |
401 | shared_ptr<Channel> get_channel(struct sr_channel *ptr); | |
402 | ||
403 | struct sr_dev_inst *_structure; | |
404 | map<struct sr_channel *, unique_ptr<Channel> > _channels; | |
405 | private: | |
406 | map<string, unique_ptr<ChannelGroup> > _channel_groups; | |
407 | ||
408 | friend class Session; | |
409 | friend class Channel; | |
410 | friend class ChannelGroup; | |
411 | friend class Output; | |
412 | friend class Analog; | |
413 | friend struct std::default_delete<Device>; | |
414 | }; | |
415 | ||
416 | /** A real hardware device, connected via a driver */ | |
417 | class SR_API HardwareDevice : | |
418 | public UserOwned<HardwareDevice>, | |
419 | public Device | |
420 | { | |
421 | public: | |
422 | /** Driver providing this device. */ | |
423 | shared_ptr<Driver> driver(); | |
424 | private: | |
425 | HardwareDevice(shared_ptr<Driver> driver, struct sr_dev_inst *structure); | |
426 | ~HardwareDevice(); | |
427 | shared_ptr<Device> get_shared_from_this(); | |
428 | shared_ptr<Driver> _driver; | |
429 | ||
430 | friend class Driver; | |
431 | friend class ChannelGroup; | |
432 | friend struct std::default_delete<HardwareDevice>; | |
433 | }; | |
434 | ||
435 | /** A virtual device, created by the user */ | |
436 | class SR_API UserDevice : | |
437 | public UserOwned<UserDevice>, | |
438 | public Device | |
439 | { | |
440 | public: | |
441 | /** Add a new channel to this device. */ | |
442 | shared_ptr<Channel> add_channel(unsigned int index, const ChannelType *type, string name); | |
443 | private: | |
444 | UserDevice(string vendor, string model, string version); | |
445 | ~UserDevice(); | |
446 | shared_ptr<Device> get_shared_from_this(); | |
447 | ||
448 | friend class Context; | |
449 | friend struct std::default_delete<UserDevice>; | |
450 | }; | |
451 | ||
452 | /** A channel on a device */ | |
453 | class SR_API Channel : | |
454 | public ParentOwned<Channel, Device> | |
455 | { | |
456 | public: | |
457 | /** Current name of this channel. */ | |
458 | string name() const; | |
459 | /** Set the name of this channel. * | |
460 | * @param name Name string to set. */ | |
461 | void set_name(string name); | |
462 | /** Type of this channel. */ | |
463 | const ChannelType *type() const; | |
464 | /** Enabled status of this channel. */ | |
465 | bool enabled() const; | |
466 | /** Set the enabled status of this channel. | |
467 | * @param value Boolean value to set. */ | |
468 | void set_enabled(bool value); | |
469 | /** Get the index number of this channel. */ | |
470 | unsigned int index() const; | |
471 | private: | |
472 | explicit Channel(struct sr_channel *structure); | |
473 | ~Channel(); | |
474 | struct sr_channel *_structure; | |
475 | const ChannelType * const _type; | |
476 | friend class Device; | |
477 | friend class UserDevice; | |
478 | friend class ChannelGroup; | |
479 | friend class Session; | |
480 | friend class TriggerStage; | |
481 | friend class Context; | |
482 | friend struct std::default_delete<Channel>; | |
483 | }; | |
484 | ||
485 | /** A group of channels on a device, which share some configuration */ | |
486 | class SR_API ChannelGroup : | |
487 | public ParentOwned<ChannelGroup, Device>, | |
488 | public Configurable | |
489 | { | |
490 | public: | |
491 | /** Name of this channel group. */ | |
492 | string name() const; | |
493 | /** List of the channels in this group. */ | |
494 | vector<shared_ptr<Channel> > channels(); | |
495 | private: | |
496 | ChannelGroup(const Device *device, struct sr_channel_group *structure); | |
497 | ~ChannelGroup(); | |
498 | vector<Channel *> _channels; | |
499 | friend class Device; | |
500 | friend struct std::default_delete<ChannelGroup>; | |
501 | }; | |
502 | ||
503 | /** A trigger configuration */ | |
504 | class SR_API Trigger : public UserOwned<Trigger> | |
505 | { | |
506 | public: | |
507 | /** Name of this trigger configuration. */ | |
508 | string name() const; | |
509 | /** List of the stages in this trigger. */ | |
510 | vector<shared_ptr<TriggerStage> > stages(); | |
511 | /** Add a new stage to this trigger. */ | |
512 | shared_ptr<TriggerStage> add_stage(); | |
513 | private: | |
514 | Trigger(shared_ptr<Context> context, string name); | |
515 | ~Trigger(); | |
516 | struct sr_trigger *_structure; | |
517 | shared_ptr<Context> _context; | |
518 | vector<unique_ptr<TriggerStage> > _stages; | |
519 | friend class Context; | |
520 | friend class Session; | |
521 | friend struct std::default_delete<Trigger>; | |
522 | }; | |
523 | ||
524 | /** A stage in a trigger configuration */ | |
525 | class SR_API TriggerStage : | |
526 | public ParentOwned<TriggerStage, Trigger> | |
527 | { | |
528 | public: | |
529 | /** Index number of this stage. */ | |
530 | int number() const; | |
531 | /** List of match conditions on this stage. */ | |
532 | vector<shared_ptr<TriggerMatch> > matches(); | |
533 | /** Add a new match condition to this stage. | |
534 | * @param channel Channel to match on. | |
535 | * @param type TriggerMatchType to apply. */ | |
536 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type); | |
537 | /** Add a new match condition to this stage. | |
538 | * @param channel Channel to match on. | |
539 | * @param type TriggerMatchType to apply. | |
540 | * @param value Threshold value. */ | |
541 | void add_match(shared_ptr<Channel> channel, const TriggerMatchType *type, float value); | |
542 | private: | |
543 | struct sr_trigger_stage *_structure; | |
544 | vector<unique_ptr<TriggerMatch> > _matches; | |
545 | explicit TriggerStage(struct sr_trigger_stage *structure); | |
546 | ~TriggerStage(); | |
547 | friend class Trigger; | |
548 | friend struct std::default_delete<TriggerStage>; | |
549 | }; | |
550 | ||
551 | /** A match condition in a trigger configuration */ | |
552 | class SR_API TriggerMatch : | |
553 | public ParentOwned<TriggerMatch, TriggerStage> | |
554 | { | |
555 | public: | |
556 | /** Channel this condition matches on. */ | |
557 | shared_ptr<Channel> channel(); | |
558 | /** Type of match. */ | |
559 | const TriggerMatchType *type() const; | |
560 | /** Threshold value. */ | |
561 | float value() const; | |
562 | private: | |
563 | TriggerMatch(struct sr_trigger_match *structure, shared_ptr<Channel> channel); | |
564 | ~TriggerMatch(); | |
565 | struct sr_trigger_match *_structure; | |
566 | shared_ptr<Channel> _channel; | |
567 | friend class TriggerStage; | |
568 | friend struct std::default_delete<TriggerMatch>; | |
569 | }; | |
570 | ||
571 | /** Type of session stopped callback */ | |
572 | typedef function<void()> SessionStoppedCallback; | |
573 | ||
574 | /** Type of datafeed callback */ | |
575 | typedef function<void(shared_ptr<Device>, shared_ptr<Packet>)> | |
576 | DatafeedCallbackFunction; | |
577 | ||
578 | /* Data required for C callback function to call a C++ datafeed callback */ | |
579 | class SR_PRIV DatafeedCallbackData | |
580 | { | |
581 | public: | |
582 | void run(const struct sr_dev_inst *sdi, | |
583 | const struct sr_datafeed_packet *pkt); | |
584 | private: | |
585 | DatafeedCallbackFunction _callback; | |
586 | DatafeedCallbackData(Session *session, | |
587 | DatafeedCallbackFunction callback); | |
588 | Session *_session; | |
589 | friend class Session; | |
590 | }; | |
591 | ||
592 | /** A virtual device associated with a stored session */ | |
593 | class SR_API SessionDevice : | |
594 | public ParentOwned<SessionDevice, Session>, | |
595 | public Device | |
596 | { | |
597 | private: | |
598 | explicit SessionDevice(struct sr_dev_inst *sdi); | |
599 | ~SessionDevice(); | |
600 | shared_ptr<Device> get_shared_from_this(); | |
601 | ||
602 | friend class Session; | |
603 | friend struct std::default_delete<SessionDevice>; | |
604 | }; | |
605 | ||
606 | /** A sigrok session */ | |
607 | class SR_API Session : public UserOwned<Session> | |
608 | { | |
609 | public: | |
610 | /** Add a device to this session. | |
611 | * @param device Device to add. */ | |
612 | void add_device(shared_ptr<Device> device); | |
613 | /** List devices attached to this session. */ | |
614 | vector<shared_ptr<Device> > devices(); | |
615 | /** Remove all devices from this session. */ | |
616 | void remove_devices(); | |
617 | /** Add a datafeed callback to this session. | |
618 | * @param callback Callback of the form callback(Device, Packet). */ | |
619 | void add_datafeed_callback(DatafeedCallbackFunction callback); | |
620 | /** Remove all datafeed callbacks from this session. */ | |
621 | void remove_datafeed_callbacks(); | |
622 | /** Start the session. */ | |
623 | void start(); | |
624 | /** Run the session event loop. */ | |
625 | void run(); | |
626 | /** Stop the session. */ | |
627 | void stop(); | |
628 | /** Return whether the session is running. */ | |
629 | bool is_running() const; | |
630 | /** Set callback to be invoked on session stop. */ | |
631 | void set_stopped_callback(SessionStoppedCallback callback); | |
632 | /** Get current trigger setting. */ | |
633 | shared_ptr<Trigger> trigger(); | |
634 | /** Get the context. */ | |
635 | shared_ptr<Context> context(); | |
636 | /** Set trigger setting. | |
637 | * @param trigger Trigger object to use. */ | |
638 | void set_trigger(shared_ptr<Trigger> trigger); | |
639 | /** Get filename this session was loaded from. */ | |
640 | string filename() const; | |
641 | private: | |
642 | explicit Session(shared_ptr<Context> context); | |
643 | Session(shared_ptr<Context> context, string filename); | |
644 | ~Session(); | |
645 | shared_ptr<Device> get_device(const struct sr_dev_inst *sdi); | |
646 | struct sr_session *_structure; | |
647 | const shared_ptr<Context> _context; | |
648 | map<const struct sr_dev_inst *, unique_ptr<SessionDevice> > _owned_devices; | |
649 | map<const struct sr_dev_inst *, shared_ptr<Device> > _other_devices; | |
650 | vector<unique_ptr<DatafeedCallbackData> > _datafeed_callbacks; | |
651 | SessionStoppedCallback _stopped_callback; | |
652 | string _filename; | |
653 | shared_ptr<Trigger> _trigger; | |
654 | ||
655 | friend class Context; | |
656 | friend class DatafeedCallbackData; | |
657 | friend class SessionDevice; | |
658 | friend struct std::default_delete<Session>; | |
659 | }; | |
660 | ||
661 | /** A packet on the session datafeed */ | |
662 | class SR_API Packet : public UserOwned<Packet> | |
663 | { | |
664 | public: | |
665 | /** Type of this packet. */ | |
666 | const PacketType *type() const; | |
667 | /** Payload of this packet. */ | |
668 | shared_ptr<PacketPayload> payload(); | |
669 | private: | |
670 | Packet(shared_ptr<Device> device, | |
671 | const struct sr_datafeed_packet *structure); | |
672 | ~Packet(); | |
673 | const struct sr_datafeed_packet *_structure; | |
674 | shared_ptr<Device> _device; | |
675 | unique_ptr<PacketPayload> _payload; | |
676 | ||
677 | friend class Session; | |
678 | friend class Output; | |
679 | friend class DatafeedCallbackData; | |
680 | friend class Header; | |
681 | friend class Meta; | |
682 | friend class Logic; | |
683 | friend class Analog; | |
684 | friend class Context; | |
685 | friend struct std::default_delete<Packet>; | |
686 | }; | |
687 | ||
688 | /** Abstract base class for datafeed packet payloads */ | |
689 | class SR_API PacketPayload | |
690 | { | |
691 | protected: | |
692 | PacketPayload(); | |
693 | virtual ~PacketPayload() = 0; | |
694 | private: | |
695 | virtual shared_ptr<PacketPayload> share_owned_by(shared_ptr<Packet> parent) = 0; | |
696 | ||
697 | friend class Packet; | |
698 | friend class Output; | |
699 | friend struct std::default_delete<PacketPayload>; | |
700 | }; | |
701 | ||
702 | /** Payload of a datafeed header packet */ | |
703 | class SR_API Header : | |
704 | public ParentOwned<Header, Packet>, | |
705 | public PacketPayload | |
706 | { | |
707 | public: | |
708 | /* Feed version number. */ | |
709 | int feed_version() const; | |
710 | /* Start time of this session. */ | |
711 | Glib::TimeVal start_time() const; | |
712 | private: | |
713 | explicit Header(const struct sr_datafeed_header *structure); | |
714 | ~Header(); | |
715 | shared_ptr<PacketPayload> share_owned_by(shared_ptr<Packet> parent); | |
716 | ||
717 | const struct sr_datafeed_header *_structure; | |
718 | ||
719 | friend class Packet; | |
720 | }; | |
721 | ||
722 | /** Payload of a datafeed metadata packet */ | |
723 | class SR_API Meta : | |
724 | public ParentOwned<Meta, Packet>, | |
725 | public PacketPayload | |
726 | { | |
727 | public: | |
728 | /* Mapping of (ConfigKey, value) pairs. */ | |
729 | map<const ConfigKey *, Glib::VariantBase> config() const; | |
730 | private: | |
731 | explicit Meta(const struct sr_datafeed_meta *structure); | |
732 | ~Meta(); | |
733 | shared_ptr<PacketPayload> share_owned_by(shared_ptr<Packet> parent); | |
734 | ||
735 | const struct sr_datafeed_meta *_structure; | |
736 | map<const ConfigKey *, Glib::VariantBase> _config; | |
737 | ||
738 | friend class Packet; | |
739 | }; | |
740 | ||
741 | /** Payload of a datafeed packet with logic data */ | |
742 | class SR_API Logic : | |
743 | public ParentOwned<Logic, Packet>, | |
744 | public PacketPayload | |
745 | { | |
746 | public: | |
747 | /* Pointer to data. */ | |
748 | void *data_pointer(); | |
749 | /* Data length in bytes. */ | |
750 | size_t data_length() const; | |
751 | /* Size of each sample in bytes. */ | |
752 | unsigned int unit_size() const; | |
753 | private: | |
754 | explicit Logic(const struct sr_datafeed_logic *structure); | |
755 | ~Logic(); | |
756 | shared_ptr<PacketPayload> share_owned_by(shared_ptr<Packet> parent); | |
757 | ||
758 | const struct sr_datafeed_logic *_structure; | |
759 | ||
760 | friend class Packet; | |
761 | friend class Analog; | |
762 | friend struct std::default_delete<Logic>; | |
763 | }; | |
764 | ||
765 | /** Payload of a datafeed packet with analog data */ | |
766 | class SR_API Analog : | |
767 | public ParentOwned<Analog, Packet>, | |
768 | public PacketPayload | |
769 | { | |
770 | public: | |
771 | /** Pointer to data. */ | |
772 | void *data_pointer(); | |
773 | /** | |
774 | * Fills dest pointer with the analog data converted to float. | |
775 | * The pointer must have space for num_samples() floats. | |
776 | */ | |
777 | void get_data_as_float(float *dest); | |
778 | /** Number of samples in this packet. */ | |
779 | unsigned int num_samples() const; | |
780 | /** Channels for which this packet contains data. */ | |
781 | vector<shared_ptr<Channel> > channels(); | |
782 | /** Size of a single sample in bytes. */ | |
783 | unsigned int unitsize() const; | |
784 | /** Samples use a signed data type. */ | |
785 | bool is_signed() const; | |
786 | /** Samples use float. */ | |
787 | bool is_float() const; | |
788 | /** Samples are stored in big-endian order. */ | |
789 | bool is_bigendian() const; | |
790 | /** | |
791 | * Number of significant digits after the decimal point if positive, | |
792 | * or number of non-significant digits before the decimal point if negative | |
793 | * (refers to the value we actually read on the wire). | |
794 | */ | |
795 | int digits() const; | |
796 | /** TBD */ | |
797 | bool is_digits_decimal() const; | |
798 | /** TBD */ | |
799 | shared_ptr<Rational> scale(); | |
800 | /** TBD */ | |
801 | shared_ptr<Rational> offset(); | |
802 | /** Measured quantity of the samples in this packet. */ | |
803 | const Quantity *mq() const; | |
804 | /** Unit of the samples in this packet. */ | |
805 | const Unit *unit() const; | |
806 | /** Measurement flags associated with the samples in this packet. */ | |
807 | vector<const QuantityFlag *> mq_flags() const; | |
808 | /** | |
809 | * Provides a Logic packet that contains a conversion of the analog | |
810 | * data using a simple threshold. | |
811 | * | |
812 | * @param threshold Threshold to use. | |
813 | * @param data_ptr Pointer to num_samples() bytes where the logic | |
814 | * samples are stored. When nullptr, memory for | |
815 | * logic->data_pointer() will be allocated and must | |
816 | * be freed by the caller. | |
817 | */ | |
818 | shared_ptr<Logic> get_logic_via_threshold(float threshold, | |
819 | uint8_t *data_ptr=nullptr) const; | |
820 | /** | |
821 | * Provides a Logic packet that contains a conversion of the analog | |
822 | * data using a Schmitt-Trigger. | |
823 | * | |
824 | * @param lo_thr Low threshold to use (anything below this is low). | |
825 | * @param hi_thr High threshold to use (anything above this is high). | |
826 | * @param state Points to a byte that contains the current state of the | |
827 | * converter. For best results, set to value of logic | |
828 | * sample n-1. | |
829 | * @param data_ptr Pointer to num_samples() bytes where the logic | |
830 | * samples are stored. When nullptr, memory for | |
831 | * logic->data_pointer() will be allocated and must be | |
832 | * freed by the caller. | |
833 | */ | |
834 | shared_ptr<Logic> get_logic_via_schmitt_trigger(float lo_thr, | |
835 | float hi_thr, uint8_t *state, uint8_t *data_ptr=nullptr) const; | |
836 | private: | |
837 | explicit Analog(const struct sr_datafeed_analog *structure); | |
838 | ~Analog(); | |
839 | shared_ptr<PacketPayload> share_owned_by(shared_ptr<Packet> parent); | |
840 | ||
841 | const struct sr_datafeed_analog *_structure; | |
842 | ||
843 | friend class Packet; | |
844 | }; | |
845 | ||
846 | /** Number represented by a numerator/denominator integer pair */ | |
847 | class SR_API Rational : | |
848 | public ParentOwned<Rational, Analog> | |
849 | { | |
850 | public: | |
851 | /** Numerator, i.e. the dividend. */ | |
852 | int64_t numerator() const; | |
853 | /** Denominator, i.e. the divider. */ | |
854 | uint64_t denominator() const; | |
855 | /** Actual (lossy) value. */ | |
856 | float value() const; | |
857 | private: | |
858 | explicit Rational(const struct sr_rational *structure); | |
859 | ~Rational(); | |
860 | shared_ptr<Rational> share_owned_by(shared_ptr<Analog> parent); | |
861 | ||
862 | const struct sr_rational *_structure; | |
863 | ||
864 | friend class Analog; | |
865 | friend struct std::default_delete<Rational>; | |
866 | }; | |
867 | ||
868 | /** An input format supported by the library */ | |
869 | class SR_API InputFormat : | |
870 | public ParentOwned<InputFormat, Context> | |
871 | { | |
872 | public: | |
873 | /** Name of this input format. */ | |
874 | string name() const; | |
875 | /** Description of this input format. */ | |
876 | string description() const; | |
877 | /** A list of preferred file name extensions for this file format. | |
878 | * @note This list is a recommendation only. */ | |
879 | vector<string> extensions() const; | |
880 | /** Options supported by this input format. */ | |
881 | map<string, shared_ptr<Option> > options(); | |
882 | /** Create an input using this input format. | |
883 | * @param options Mapping of (option name, value) pairs. */ | |
884 | shared_ptr<Input> create_input(map<string, Glib::VariantBase> | |
885 | options = map<string, Glib::VariantBase>()); | |
886 | private: | |
887 | explicit InputFormat(const struct sr_input_module *structure); | |
888 | ~InputFormat(); | |
889 | ||
890 | const struct sr_input_module *_structure; | |
891 | ||
892 | friend class Context; | |
893 | friend class InputDevice; | |
894 | friend struct std::default_delete<InputFormat>; | |
895 | }; | |
896 | ||
897 | /** An input instance (an input format applied to a file or stream) */ | |
898 | class SR_API Input : public UserOwned<Input> | |
899 | { | |
900 | public: | |
901 | /** Virtual device associated with this input. */ | |
902 | shared_ptr<InputDevice> device(); | |
903 | /** Send next stream data. | |
904 | * @param data Next stream data. | |
905 | * @param length Length of data. */ | |
906 | void send(void *data, size_t length); | |
907 | /** Signal end of input data. */ | |
908 | void end(); | |
909 | void reset(); | |
910 | private: | |
911 | Input(shared_ptr<Context> context, const struct sr_input *structure); | |
912 | ~Input(); | |
913 | const struct sr_input *_structure; | |
914 | shared_ptr<Context> _context; | |
915 | unique_ptr<InputDevice> _device; | |
916 | ||
917 | friend class Context; | |
918 | friend class InputFormat; | |
919 | friend struct std::default_delete<Input>; | |
920 | }; | |
921 | ||
922 | /** A virtual device associated with an input */ | |
923 | class SR_API InputDevice : | |
924 | public ParentOwned<InputDevice, Input>, | |
925 | public Device | |
926 | { | |
927 | private: | |
928 | InputDevice(shared_ptr<Input> input, struct sr_dev_inst *sdi); | |
929 | ~InputDevice(); | |
930 | shared_ptr<Device> get_shared_from_this(); | |
931 | shared_ptr<Input> _input; | |
932 | friend class Input; | |
933 | friend struct std::default_delete<InputDevice>; | |
934 | }; | |
935 | ||
936 | /** An option used by an output format */ | |
937 | class SR_API Option : public UserOwned<Option> | |
938 | { | |
939 | public: | |
940 | /** Short name of this option suitable for command line usage. */ | |
941 | string id() const; | |
942 | /** Short name of this option suitable for GUI usage. */ | |
943 | string name() const; | |
944 | /** Description of this option in a sentence. */ | |
945 | string description() const; | |
946 | /** Default value for this option. */ | |
947 | Glib::VariantBase default_value() const; | |
948 | /** Possible values for this option, if a limited set. */ | |
949 | vector<Glib::VariantBase> values() const; | |
950 | /** Parse a string argument into the appropriate type for this option. */ | |
951 | Glib::VariantBase parse_string(string value); | |
952 | private: | |
953 | Option(const struct sr_option *structure, | |
954 | shared_ptr<const struct sr_option *> structure_array); | |
955 | ~Option(); | |
956 | const struct sr_option *_structure; | |
957 | shared_ptr<const struct sr_option *> _structure_array; | |
958 | ||
959 | friend class InputFormat; | |
960 | friend class OutputFormat; | |
961 | friend struct std::default_delete<Option>; | |
962 | }; | |
963 | ||
964 | /** An output format supported by the library */ | |
965 | class SR_API OutputFormat : | |
966 | public ParentOwned<OutputFormat, Context> | |
967 | { | |
968 | public: | |
969 | /** Name of this output format. */ | |
970 | string name() const; | |
971 | /** Description of this output format. */ | |
972 | string description() const; | |
973 | /** A list of preferred file name extensions for this file format. | |
974 | * @note This list is a recommendation only. */ | |
975 | vector<string> extensions() const; | |
976 | /** Options supported by this output format. */ | |
977 | map<string, shared_ptr<Option> > options(); | |
978 | /** Create an output using this format. | |
979 | * @param device Device to output for. | |
980 | * @param options Mapping of (option name, value) pairs. */ | |
981 | shared_ptr<Output> create_output(shared_ptr<Device> device, | |
982 | map<string, Glib::VariantBase> options = map<string, Glib::VariantBase>()); | |
983 | /** Create an output using this format. | |
984 | * @param filename Name of destination file. | |
985 | * @param device Device to output for. | |
986 | * @param options Mapping of (option name, value) pairs. */ | |
987 | shared_ptr<Output> create_output(string filename, | |
988 | shared_ptr<Device> device, | |
989 | map<string, Glib::VariantBase> options = map<string, Glib::VariantBase>()); | |
990 | /** | |
991 | * Checks whether a given flag is set. | |
992 | * @param flag Flag to check | |
993 | * @return true if flag is set for this module | |
994 | * @see sr_output_flags | |
995 | */ | |
996 | bool test_flag(const OutputFlag *flag) const; | |
997 | private: | |
998 | explicit OutputFormat(const struct sr_output_module *structure); | |
999 | ~OutputFormat(); | |
1000 | ||
1001 | const struct sr_output_module *_structure; | |
1002 | ||
1003 | friend class Context; | |
1004 | friend class Output; | |
1005 | friend struct std::default_delete<OutputFormat>; | |
1006 | }; | |
1007 | ||
1008 | /** An output instance (an output format applied to a device) */ | |
1009 | class SR_API Output : public UserOwned<Output> | |
1010 | { | |
1011 | public: | |
1012 | /** Update output with data from the given packet. | |
1013 | * @param packet Packet to handle. */ | |
1014 | string receive(shared_ptr<Packet> packet); | |
1015 | private: | |
1016 | Output(shared_ptr<OutputFormat> format, shared_ptr<Device> device); | |
1017 | Output(shared_ptr<OutputFormat> format, | |
1018 | shared_ptr<Device> device, map<string, Glib::VariantBase> options); | |
1019 | Output(string filename, shared_ptr<OutputFormat> format, | |
1020 | shared_ptr<Device> device, map<string, Glib::VariantBase> options); | |
1021 | ~Output(); | |
1022 | ||
1023 | const struct sr_output *_structure; | |
1024 | const shared_ptr<OutputFormat> _format; | |
1025 | const shared_ptr<Device> _device; | |
1026 | const map<string, Glib::VariantBase> _options; | |
1027 | ||
1028 | friend class OutputFormat; | |
1029 | friend struct std::default_delete<Output>; | |
1030 | }; | |
1031 | ||
1032 | /** Base class for objects which wrap an enumeration value from libsigrok */ | |
1033 | template <class Class, typename Enum> class SR_API EnumValue | |
1034 | { | |
1035 | public: | |
1036 | /** The integer constant associated with this value. */ | |
1037 | int id() const | |
1038 | { | |
1039 | return static_cast<int>(_id); | |
1040 | } | |
1041 | /** The name associated with this value. */ | |
1042 | string name() const | |
1043 | { | |
1044 | return _name; | |
1045 | } | |
1046 | /** Get value associated with a given integer constant. */ | |
1047 | static const Class *get(int id) | |
1048 | { | |
1049 | const auto pos = _values.find(static_cast<Enum>(id)); | |
1050 | if (pos == _values.end()) | |
1051 | throw Error(SR_ERR_ARG); | |
1052 | return pos->second; | |
1053 | } | |
1054 | /** Get possible values. */ | |
1055 | static std::vector<const Class *> values() | |
1056 | { | |
1057 | std::vector<const Class *> result; | |
1058 | for (auto entry : _values) | |
1059 | result.push_back(entry.second); | |
1060 | return result; | |
1061 | } | |
1062 | protected: | |
1063 | EnumValue(Enum id, const char name[]) : _id(id), _name(name) | |
1064 | { | |
1065 | } | |
1066 | ~EnumValue() | |
1067 | { | |
1068 | } | |
1069 | private: | |
1070 | static const std::map<const Enum, const Class * const> _values; | |
1071 | const Enum _id; | |
1072 | const string _name; | |
1073 | }; | |
1074 | ||
1075 | } | |
1076 | ||
1077 | #include <libsigrokcxx/enums.hpp> | |
1078 | ||
1079 | #endif |